Common stock prices, U.S., 1871-1970, annual        
   5.03 
   4.80 
   4.57 
   4.45 
   4.06 
   3.14 
   3.38 
   4.12 
   5.21 
   6.25 
   5.90 
   5.63 
   4.73 
   4.60 
   5.36 
   5.53 
   5.20 
   5.32 
   5.27 
   5.03 
   5.55 
   4.78 
   4.39 
   4.53 
   4.23 
   4.45 
   5.05 
   6.29 
   6.15 
   7.84 
   8.42 
   7.21 
   7.05 
   8.99 
   9.64 
   7.84 
   7.78 
   9.71 
   9.35 
   9.24 
   9.53 
   8.51 
   8.08 
   8.31 
   9.47 
   8.50 
   7.54 
   8.78 
   7.98 
   6.86 
   8.41 
   8.57 
   9.05 
  11.15 
  12.59 
  15.34 
  19.95 
  26.02 
  21.03 
  13.66 
   6.93 
   8.96 
   9.84 
  10.60 
  15.47 
  15.41 
  11.49 
  12.06 
  11.02 
   9.82 
   8.67 
  11.50 
  12.47 
  15.16 
  17.08 
  15.17 
  15.53 
  15.23 
  18.40 
  22.34 
  24.50 
  24.73 
  29.69 
  40.49 
  46.62 
  44.38 
  46.24 
  57.38 
  55.85 
  66.27 
  62.38 
  69.87 
  81.37 
  88.17 
  85.26 
  91.93 
  98.70 
  97.84 
  83.82